The Senate could take up gun-control legislation this week, but it is unclear if Republicans will let it come to a vote. Sens. Rand Paul, Mike Lee and Ted Cruz have threatened to filibuster legislation that would “infringe on the American people's constitutional right to bear arms, or on their ability to exercise this right without being subjected to government surveillance."

Also worth noting on Monday: Secretary of State John Kerry continues a three-day visit to Israel and the West Bank aimed at restarting peace talks; Secretary of the Treasury Jack Lew begins a two-day visit to Europe for discussions on economic developments in the region; and the Senate returns after its Easter recess.

Immigration also will be a top topic in Washington this week. Sen. Chuck Schumer, D-N.Y., said Sunday he thinks the bipartisan Gang of Eight will have its immigration plan completed by the end of the week.

The other big topic this week: Obama’s 2014 fiscal budget, which White House senior adviser Dan Pfeiffer said Sunday will not make Republicans or Democrats entirely happy. Meanwhile, reporters are invited Monday to watch copies of the budget running on binding lines at the Government Printing Office, and they’ll get an early look at the mobile web app for the budget.